Charles d



lC, D. SHEPARD. y CENTRIFUGAL LIQUD SEPARATOR.

(No Model.)

No. 379,133.' Patented Mar. 6, 1888.

'UNITED STATES' PATENT OFFICE?.

CHARLES D. SHEPARD, or NEW YoRk,N. Y.

CENTRIFUGAL. LlauiDsePARA-roa- SPECIFICATION forming part of LettersPatent No. 379,133, dated March 6, 1888. I Application filed May 9,1887. Serial No. 237.612. (No model.)

To all whom it may concern: f

Be it known that I, CHARLES D. SHEPARD, a citizen of the United States,residing at New York, in the county of New York, State of New York, haveinvented certain new and useful Improvements in Centrifugal Liquid-Separators, of which the following is a specification, reference beinghad therein to the ac- `companying drawing.

stantially central vertical section of a separating-bowl and itsimmediateaccessories, A-represents the spindle of the machine; B, theupper .portion of the frame-work; C, the receiver for the lighterconstituent, which receiver is mounted upon the frame-work and providedwith a standard, G', jointed as at C2, for the support of the feed-pipeD,which is'provided in this instance with a controlling-valve, D, and adischargeconductor, E, and (in this instance) constructed in accordancewith myinvention as disclosed inmy application, No. 236,584, pendingherewith.

F represents the separatingbowl, which is provided with a neck, F', inthis instance arranged at the bottom of the bowl, and having a closeden'd, FZ, inl which the spindle A is seated.

G represents the supply-chamber, secured to the bottom and spindle by ascrew or bolt,

G, and provided with a supply-pipe, G2,

which projects toward andnear to the wall of the bowl F. Aseries ofannular shelves, F3, extend from the inner surface of the walls of thebowl toward the center thereof, and each shelf is provided with a singleport, F4, -that of one shelf being arranged at an opposite side of thebowl from that of the next adjacent shelf. The discharge-conductor E isprojected into the bowl and above the upper shelf of the series. Thelower shelf projects inwardly beyond the walls F5 of the neck F,'andsaidneck is provided at its closed end with one or more ports, F, forthe delivery therefrom of a lighter constituent.

The bowl F is provided with an opening or mouth, FT, into which the feedand discharge pipes or conductors D and E are projected.'

is, the distance from the wall ofthe bowl to the edge of each shelf orpartitionand the neck isincreased in its diameter, all of which changesare for purposes which I will` now describe.

Although the principal object in view is, as before stated, a materialincrease in the ra pidity of the delivery of the lighter constituent,and this without injury to its ber or globules, still another object isto limit the lateral thickness or rather extent of the annular body ofthe heavier constituent of a liquid when the bowl is operatingthereupon, and to prevent the lighter constituent from rising above acertain point Within the bowl during this operation.

Now, for the purpose of setting forth and clearly illustrating theoperation of my invention, Iwill describe the same-as, for example, inseparatingcream from milk.

The milk is supplied through the pipe or conductor D, the quantity beingcontrolled by the valve or cock D', as desired, and it falls into thesupply-chamber G, and passes from thence, through the pipe G", into thespace formed by the two lower shelves, F3. As the lower compartment ofthe bowl proper becomes filled the incoming milk will force any surplusupwardly through the port Finto the next compartment above, and so onuntil all the chambers or compartments are filled, it be- IOO ingunderstood, however, that immediately upon the entrance of the milk intothe lower compartment centrifugal force acts to separate the cream fromthe milk, so that the latter occupies a space bounded substantially bythe compartment-that is. by the wall of the bowl and opposite surfacesof adjacent shelves or partitions, as shown by the dotted line X- whilethe cream forms in an annular body, indicated by the dotted lilies X andY, the line Y indicating the inner vert-ical line of the annular body ofcream as it is collected by the operation of the bowl. Now itwill beseen that nothing but skimmed milk will be carried to the top oftheupper slielfof the bowl,and thisis insured by two facts: first, byreason of the separation of the compound liquid into several distinctportions, each being contained between two adjacent shelves, so thatnearly all the cream in the milk admitted into thelower compartment isimmediately separated, and such portions thereof as pass upwardly intothe next compartment are immediately separated, and so on fromcompartment to compartment, so-that the cream has been sepa* rated fromthe milk before the latter reaches the upper compartment. The otherIfact, which insures nothing but the entrance of skimmed milk upon theupper shelf, is that of the construction before described, whereby Iexpedite the delivery of the cream from within the body of the bowl, andthis is accomplished inthe following manner: By extending the neck Foutwardly beyond the opening F8, through which the neck F'coinmnnicateswith thebowl F, I provide for the operation of centrifugal force uponthe cream, and said force acts at the point where the cream enters theneck, so as to cause the cream with a greater or less force to move in aradial direction toward the wall F5 of the neck, and thus also to drawdown the cream above. The curved portion X of the creain-line indicatesthe point where the centrifugal force has the effect just mentioned.Now, instead of allowing the cream to immediately escape entirely fromthe bowl or from the neck while under the influence of centrifugalforce, which inliuence would result in destroying the globules of thecicam, it is cushioned by the cream already within the neck, and theinjurious effectis obviated; and, furthermore, the cream is deliveredfrom the neck by the action of gravity through the port or ports F, ofwhich I may have one or more, as desired. As the cream passes throughthe port it falls into the empty receiver rst, but afterward into agreater or less quantity ofA cream within the receiver, and is againcushioned against injury. Itis understood, of course, that the creamfalls by action of gravity from the upper shelf down to the opening FSof the bowl, so that in the delivery of the cream from the bowl as awhole I employ, first, the force of gravity, then centrifugal force,and, finally, again the force of gravity. In this way I increase therapidity with which the cream can be delivered from the bowl without injuring the globules thereof,

and I also prevent the'cream from rising above the upper shelf withinthe bowl, so that I can safely project my discharge-conducto]` directlyinto the bowl, instead of being required to form an additional annularchamber for the reception of the skimmed milk and for the operation of adischarge-conductor therein.

It is apparent that I can increase or decrease the amount of centrifugalforce to which I subject the cream by increasing or decreasing thedistance to the walls of the neck from the opening by which itcommunicates with the bowl. As shown by dotted lines C F, I may even extend the neck beyond the bowl for the purpose of increasing thecentrifugal force upon the cream. I may employ as many or as few shelvesor partitions as desired.

Having described my invention and its operation, what I claim is- 1. Abowl for a centrifugal separator, having an annular sheltI and a neckdepending from the shelfoutside ofthe inner edge thereof, l

the bottom of the bowl being provided with a cream-outlet, substantiallyas specified.

2. A bowl for a centrifugalseparator, provided with a depending neck andwith aseries of annular shelves or partit-ions, and having its bottomshelf projecting inwardly beyond the vertical walls of the dependingneck, said neck having an outlet, substantially as specined, whereby thedelivery of the cream or lighter constituent is accomplished, first, bythe action ofgravity, then by centrifugal force, and, finally, bygravity.

3. A bowl for a centrifugal machine, with an outlet for a lighterconstituent and having a series of shelves or partitions and a dependingneck located beyond the inner vertical line ofthe edges of the shelves,in combination with a discharge conductor projected within the bowl andabove the upper shelf thereof fordischarging the heavier constituent,substantially as specified'.

4. The combination, with the bowl F, provided with port FG and havingthe shelves F3, the openings F7 F, and the neck F', having walls F5outside of the edges of the shelves, of thespindle A, supply-vessel G,having the pipe G, the receiver C, supply-pipe D, and thedischarge-conductor E, substantially as specified.

5. rIhe bowl F, provided with ports F0 and having the openings FT F",the shelves F, provided with the ports F4, and the depending neck F,located beyond theinner vertical line of the edges of the shelves,substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES D. SHEPARD.

Witnesses:

L. C. HILLS, B. F. MoRsELL.

